After send online enquiry, we will reply you as soon as possible, if not get any response on time please contact us,you can choose the following method to contact us:1. Email:sales@chemical-reagent.com2. Tel:+86 592 5365887 3. Fax:0592-3778357 4. Send enquiry online:

Green Stone company is the perfect choice for raw material supplier. It frees you from worry about Product's quality, and its price is very reasonable, what' s more, they are free shipping all over the world.

NO.2

From: GNC Mr.Ryan / Manufacturer's Representative E-mail: **********

Green Stone is a member of Herbal Material Association, which means it take great responsibility to ensure and enhancing good quality health supplement products. It is a GMP (good manufacturing practice) compliant company.

NO.3

From: USANA Mr.Alexander / Vice-President E-mail: **********

We find that the product ingredient information is very comprehensive. Desides stating the source of the ingredients, Green Stone goes to the great length to provide the information and clinical studies of each ingredient used. This is a hallmark of high quality product and services of an excellent herbal raw material online store.